nixos-conf/services/sunshine.nix

{ pkgs, config, ... }:
let
  resolutions = [
    "1920x1080"
    "2400x1080"
    "2160x1440"
    "2560x1440"
    "3840x2160"
  ];
  apps =
    (
      resolutions:
      map (resolution: {
        name = "${resolution} Desktop";
        #          prep-cmd = [
        #            {
        #              do = "${pkgs.xrandr}/bin/kscreen-doctor output.DP-4.mode.2560x1440@144";
        #              undo = "${pkgs.xrandr}/bin/kscreen-doctor output.DP-4.mode.3440x1440@144";
        #            }
        #          ];
        exclude-global-prep-cmd = "false";
        auto-detach = "true";
      }) resolutions
    )
      resolutions;
in
{
  assertions = [
    {
      assertion = config.services.xserver.enable;
      message = "Game streaming does not work without a desktop!";
    }
  ];

  services.sunshine = {
    enable = true;
    autoStart = true;
    openFirewall = true;
    settings = {
      sunshine_name = "Gaming NixOS";
      resolutions = resolutions;
      fps = [
        30
        60
        90
        120
      ];
      address_family = "both";
    };
    applications = {
      apps = apps;
    };
  };
}